build(deps): bump the actions group with 1 update

Bumps the actions group with 1 update: [actions/add-to-project](https://github.com/actions/add-to-project).


Updates `actions/add-to-project` from 0.5.0 to 0.6.0
- [Release notes](https://github.com/actions/add-to-project/releases)
- [Commits](actions/add-to-project@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: actions/add-to-project
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/add-new-pr-to-oss-triaging.yml

@@ -38,7 +38,7 @@ jobs:
     needs: [check-pr-if-external]
     if: needs.check-pr-if-external.outputs.is_external_pr == 'true'
     steps:
-      - uses: actions/add-to-project@v0.5.0
+      - uses: actions/add-to-project@v0.6.0
         with:
           project-url: ${{ env.PROJECT_URL }}
           github-token: ${{ secrets.ADD_TO_PROJECT_TOKEN }}